On a U-100 insulin syringe, 1 mg of semaglutide is 100 units at 1 mg/mL, 50 units at 2 mg/mL, 40 units at 2.5 mg/mL, 25 units at 4 mg/mL, 20 units at 5 mg/mL, 10 units at 10 mg/mL.
At 2.5 mg/mL, the strength most often seen on compounded labels, it is 0.4 mL, which is 40 units. Use the calculator with the strength printed on your own vial.
1 mg of semaglutide in units at every strength
| Vial strength | Volume | Units (U-100) |
|---|---|---|
| 1 mg/mL | 1 mL | 100 units |
| 2 mg/mL | 0.5 mL | 50 units |
| 2.5 mg/mL | 0.4 mL | 40 units |
| 4 mg/mL | 0.25 mL | 25 units |
| 5 mg/mL | 0.2 mL | 20 units |
| 10 mg/mL | 0.1 mL | 10 units |
Dose ↔ units
How long will my vial last?
Uses the vial and dose from the calculator above.
Real vials can hold slightly more or less than the label says, and a little is lost in the needle.
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Same dose, different units
At 2.5 mg/mL, 1 mg is 40 units. Drawing those same 40 units from a 5 mg/mL vial gives 2 mg, not 1 mg. Always check the mg/mL on the vial you are using.
In July 2024 the FDA warned about dosing errors with compounded semaglutide, including mix-ups between mg, mL and units (FDA alert). The same math applies to any vial.
Questions
How many mL is 1 mg of semaglutide?
It depends on the vial: 1 mL at 1 mg/mL, 0.5 mL at 2 mg/mL, 0.4 mL at 2.5 mg/mL, 0.25 mL at 4 mg/mL, 0.2 mL at 5 mg/mL, 0.1 mL at 10 mg/mL.
Is 1 mg of semaglutide the same number of units on every vial?
No. The units depend on the strength printed on the vial: 100 units at 1 mg/mL, 50 units at 2 mg/mL, 40 units at 2.5 mg/mL, 25 units at 4 mg/mL, 20 units at 5 mg/mL, 10 units at 10 mg/mL.
More charts
- Semaglutide 1 mg/mL chart
- Semaglutide 2 mg/mL chart
- Semaglutide 2.5 mg/mL chart
- Semaglutide 4 mg/mL chart
- Semaglutide 5 mg/mL chart
- Semaglutide 10 mg/mL chart